GM Big Block V8 Engine; 8.1L/ 496 Cubic Inch; Electronic Fuel Injection; Automotive; 600 Horsepower/ 568 Foot Pounds of Torque; Cast Iron Block/ Aluminum Cylinder Heads; 10.1:1 Compression Ratio/ 4.5 Inch Bore/ 4.25 Inch Stroke; Externally Balanced; With Cylinder Heads/ Forged Steel Crankshaft/ Hypereutectic Pistons/ Hydraulic Roller Camshaft/ Base Dressed Long Block/ 4 Bolt Main Block/ 1 Piece Rear Main Seal/ 6.135 Inch OEM Type Connecting Rods With 150,000 PSI Bolts/ Valve Covers/ Oil Pan/ Timing Cover/ Sniper EFI System/ Single Plane Satin Aluminum Intake Manifold/ Distributor